CN111331228A - Synchronous rotating device of nuclear fuel rod end plug ring welding machine - Google Patents
Synchronous rotating device of nuclear fuel rod end plug ring welding machine Download PDFInfo
- Publication number
- CN111331228A CN111331228A CN201811548692.8A CN201811548692A CN111331228A CN 111331228 A CN111331228 A CN 111331228A CN 201811548692 A CN201811548692 A CN 201811548692A CN 111331228 A CN111331228 A CN 111331228A
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- welding
- fine adjustment
- synchronous belt
- fuel rod
- belt pulley
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention belongs to the technical field of nuclear fuel element manufacturing, and particularly relates to a synchronous rotating device of a nuclear fuel rod end plug ring welding machine, which comprises a motor, a speed reducer, a coupler and a driving device, wherein the motor simultaneously drives an inner synchronous belt pulley and an outer synchronous belt pulley to rotate through an extension shaft, the inner synchronous belt pulley is matched and connected with a welding chuck, so that the inner synchronous belt pulley can drive the welding chuck to rotate when rotating, and the outer synchronous belt pulley is connected with a matched top wheel device through a key groove, so that the outer synchronous belt pulley can drive the matched top wheel device to rotate when rotating; synchronous rotation device has realized chuck and top synchronous revolution, has effectively solved fuel rod end plug fraying, the surface is stained with copper scheduling problem, has improved fuel rod quality. The matched ejector device realizes the adjustment of the centering property of the tungsten electrode and the welding line outside the welding chamber, and the production efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of nuclear fuel element manufacturing, and particularly relates to a synchronous rotating device of a nuclear fuel rod end plug girth welding machine.
Background
When the nuclear fuel rod (including the parts such as the cladding tube and the end plug) is welded in a girth welding mode, firstly, the cladding tube 5 enters a welding chamber, the end plug 4 is tightly attached to the top head 2, the cladding tube is clamped by the clamping head 3 in the welding chamber, and then the cladding tube starts to rotate and be welded under the driving of the motor. In a conventional welding machine, the plug and the mandrel are fixed together on the bearing 1. During spin welding, the end plug is attached to the top head, and the friction between the end plug and the top head is relied on to enable the top head to rotate passively. During welding (TIG welding), the heat of the welding seam is mainly dissipated in a heat conduction mode through the top. In the welding process, a large amount of heat are transmitted to the bearing through the copper ejector head, along with the increase of welding times, the heat accumulates gradually, and the ball rotates after being heated in the bearing and takes place the card pause easily. Because the top head is in a passive rotation mode, the clamping of the bearing directly causes the end plug and the top head to generate relative friction, and therefore, grinding marks are generated on the surface of the end plug of the fuel rod. In addition, because copper alloys are less hard than zirconium alloys, the heated copper alloys tend to adhere to the fuel rod end plugs, resulting in fuel rod scrap.
On the other hand, in TIG welding, high centering performance must be provided between the tungsten electrode and the weld, otherwise arc heat generated by the tungsten electrode 8 cannot effectively melt the weld area to form a non-penetration defect, and therefore, centering adjustment between the tungsten electrode and the weld is indispensable. Before transformation, the top is fixed on the mandrel 7, and the longitudinal movement of the top can be realized by adjusting the number of turns of the threads of the top on the mandrel, so that the centering performance of a tungsten electrode and a welding seam is adjusted. Since the plug 2, the clamping head, is inside the welding chamber, the flange cover 6 must be completely opened during adjustment, and the gas atmosphere in the welding chamber will change. According to the performance characteristics of zirconium alloy, because the welding chamber is opened, the gas atmosphere in the cavity of the welding chamber is destroyed, therefore, after the centering adjustment of the tungsten electrode and the welding seam is completed, ten times of samples must be circularly welded again, the original gas atmosphere of the welding chamber can be recovered, and the production efficiency is seriously influenced.
Disclosure of Invention
The invention aims to provide a synchronous rotating device of a nuclear fuel rod end plug girth welding machine, aiming at the defects in the prior art. Satisfy the synchronous rotation demand of top and welding chuck to improve the fuel rod quality, on the other hand, through the top device of design with the supporting synchronous rotation device, realize the centering nature of outside adjustment tungsten utmost point and welding seam of welding chamber, improve production efficiency.
The technical scheme of the invention is as follows:
a nuclear fuel rod end plug ring welding machine synchronous rotating device comprises a motor, an inner synchronous belt pulley, an outer synchronous belt pulley, a welding chuck, a key groove and a connecting piece, wherein the motor simultaneously drives the inner synchronous belt pulley and the outer synchronous belt pulley to rotate through an extension shaft, the speed reducer and a coupler;
the central axis of the welding chuck is superposed with the central axis of the matched ejector device and is parallel to the lengthened shaft and the central axis of the motor, so that the matched ejector device and the welding chuck rotate simultaneously;
the diameters of the outer synchronous belt wheel and the inner synchronous belt wheel are consistent, and the vertical center lines are overlapped.
The matched ejection head device is characterized in that the welding chamber is of a cubic structure with a hollow interior, and one part of the matched ejection head device is inserted into the welding chamber;
the center part of the matched ejector device is an ejector fine adjustment rod;
the fine adjustment nut and the back tightening nut are connected through threads and fixed on the top fine adjustment rod;
the sealing cover is arranged outside the new flange cover to play a sealing role;
the new flange cover is of an internal leak boss structure, one part of the new flange cover is arranged inside the welding chamber, the other part of the new flange cover is arranged outside the welding chamber, the new flange cover is connected with the welding chamber through a screw rod, two bearings are arranged inside the new flange cover, wherein the outer ring of each bearing is tightly attached to the new flange cover, the inner ring of each bearing is tightly attached to the ejector head fine adjustment rod, and the bearings also play a role in transmission support;
the top head is of a cylindrical structure, the left end of the top head is provided with a section of external thread, and the thread is directly connected with a section of internal thread arranged at the rightmost side of the top head fine adjustment rod;
when the tungsten electrode and the welding seam are aligned and adjusted, the tungsten electrode is fixed, and the fine adjustment nut is rotated clockwise to push the new ejector to move longitudinally, so that the longitudinal positions of the welding seam and the tungsten electrode are changed; through manual anticlockwise rotation back of the body tight nut, can die the locking of top fine-tuning pole and back of the body tight nut, guaranteed that the tungsten utmost point centering adjustment after targetting in place, at whole fuel rod spin welding in-process, the relative position of welding seam and tungsten utmost point can not change.
The whole of the top fine adjustment rod is of a cylindrical structure, the leftmost end of the top fine adjustment rod is provided with an external nut, the middle part of the top fine adjustment rod is provided with a key groove, and the rightmost end of the top fine adjustment rod is provided with an internal thread.
The fine adjustment nut and the back tightening nut are connected through a key groove in the middle of the ejector fine adjustment rod, and the outer synchronous belt wheel is connected with the ejector fine adjustment rod through a key groove.
An O-shaped ring and a bearing are embedded in the sealing cover, wherein the outer ring of the O-shaped ring and the bearing is tightly attached to the sealing cover, the inner ring of the O-shaped ring and the bearing is tightly attached to the ejector head fine adjustment rod, the O-shaped ring is used for isolating the air outside the welding chamber and the air inside the welding chamber, and the bearing plays a role in rotation and support.
The fine adjustment nut and the back nut are both provided with outer knurls and internally provided with a cylindrical structure with an internal thread.
The sealing cover is of an internal hollow boss structure.
The invention has the beneficial effects that:
on the one hand, synchronous rotation device has realized chuck and top synchronous revolution, has effectively solved fuel rod end plug fraying, the surface is stained with copper scheduling problem, has improved the fuel rod quality. On the other hand, the matched ejector device realizes the adjustment of the centering property of the tungsten electrode and the welding seam outside the welding chamber, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic view of a prior art welder construction;
FIG. 2 is a schematic view of a prior art weld chamber configuration;
FIG. 3 is a schematic view of the apparatus of the present invention;
fig. 4 is a schematic diagram of a mating plug device.
In the figure: 1. a bearing; 2. ejecting the head; 3. welding a chuck; 4. an end plug; 5. a cladding tube; 6. a flange cover; 7. a mandrel; 8. a tungsten electrode; 9. an outer timing pulley; 10. lengthening a shaft; 11. a matched plug device; 12. an inner timing pulley; 13. a motor; 14. fine adjustment of the nut; 15. tightening the nut; 16. a plug fine adjustment rod; 17. a sealing cover; 18. an O-shaped ring; 19. a bearing; 20. a new flange cover; 21. a welding chamber; 22. ejecting the head; 23. a tungsten electrode; 24. and (7) welding seams.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
The synchronous rotating device of the nuclear fuel rod end plug ring welding machine is characterized in that a motor 13 simultaneously drives an inner synchronous belt pulley 12 and an outer synchronous belt pulley 9 to rotate through an extension shaft 10, a speed reducer and a coupler. The inner timing pulley 12 is cooperatively coupled to the welding chuck such that rotation of the inner timing pulley 12 drives the welding chuck. The outer synchronous belt pulley 9 is connected with the matched top wheel device 11 through a key groove, so that the matched top wheel device 11 can be driven to rotate when the outer synchronous belt pulley 9 rotates.
The central axis of the welding chuck coincides with the central axis of the matched ejector device 11 and is parallel to the central axes of the lengthened shaft 10 and the motor 13, so that the matched ejector device 11 and the welding chuck rotate simultaneously.
The diameters of the outer synchronous pulley 9 and the inner synchronous pulley 12 are consistent, and the vertical center lines are overlapped.
A complementary plug means 11 is shown in figure 4. The welding chamber 21 is a cubic structure with a hollow interior, and a part of the matched plug device 11 is inserted into the welding chamber 21. The center of the matched plug device 11 is provided with a plug fine adjustment rod 16, the plug fine adjustment rod 16 is of a cylindrical structure as a whole, the leftmost end of the plug fine adjustment rod is provided with a section of external nut, the middle of the plug fine adjustment rod is provided with a section of key slot, and the rightmost end of the plug fine adjustment rod is provided with a section of internal thread.
The fine adjustment nut 14 and the back nut 15 are both of cylindrical structures with external knurls and internal threads, and are fixed on the plug fine adjustment rod through threaded connection. The outer synchronous belt wheel 9 is connected with the top fine adjustment rod through a key groove in the middle of the top fine adjustment rod 16.
The sealing cover 17 is of an internal hollow boss structure, an O-shaped ring 18 and a bearing 19 are embedded in the structure, the outer rings of the O-shaped ring 18 and the bearing 19 are tightly attached to the sealing cover 17, the inner rings of the O-shaped ring 18 and the bearing 19 are tightly attached to the plug fine adjustment rod 16, the O-shaped ring 18 is used for isolating the air outside the welding chamber 21 and the air inside the welding chamber 21, and the bearing 19 plays a role in rotation and support.
The new flange cover 20 is of an internal leak boss structure, one part of the new flange cover is arranged in the welding chamber 21, the other part of the new flange cover is arranged outside the welding chamber 21 and is connected with the welding chamber 21 through a screw, two bearings 19 are arranged in the new flange cover, wherein the outer ring of each bearing 19 is tightly attached to the new flange cover 20, the inner ring of each O-shaped bearing 18 is tightly attached to the ejector head fine adjustment rod 16, and the bearings 19 also play a transmission supporting role.
The plug 22 is of cylindrical configuration with an external thread on its left end which is directly connected to an internal thread on the rightmost side of the plug fine adjustment lever 16.
When the tungsten electrode 21 and the welding seam 20 are aligned and adjusted, the tungsten electrode 21 is fixed, and the fine adjustment nut 14 is rotated clockwise to push the new plug 18 to move longitudinally, so that the longitudinal positions of the welding seam 20 and the tungsten electrode 21 are changed. Through manual anticlockwise rotation of the back nut 15, the top fine adjustment rod 16 and the back nut 15 can be locked, and after the tungsten electrode 21 is centered and adjusted in place, the relative position of the welding seam 20 and the tungsten electrode 21 cannot be changed in the whole fuel rod spin welding process.
The synchronous rotating device of the nuclear fuel rod end plug ring welding machine is realized by two synchronous belt pulleys connected with a motor, and is particularly shown in an attached figure 3. The top device matched with the synchronous rotating device comprises a core shaft, a fine adjustment rod, an adjusting nut, a back nut and the like, and an operator can realize centering adjustment of a tungsten electrode and a welding line by rotating the adjusting nut outside the welding chamber, particularly as shown in the attached drawing 4.
Claims (7)
1. A nuclear fuel rod end plug ring welding machine synchronous rotating device comprises a motor, an inner synchronous belt pulley, an outer synchronous belt pulley, a welding chuck, a key groove and a connecting piece, wherein the motor simultaneously drives the inner synchronous belt pulley and the outer synchronous belt pulley to rotate through an extension shaft, the speed reducer and a coupler;
the method is characterized in that: the central axis of the welding chuck is superposed with the central axis of the matched ejector device and is parallel to the lengthened shaft and the central axis of the motor, so that the matched ejector device and the welding chuck rotate simultaneously;
the diameters of the outer synchronous belt wheel and the inner synchronous belt wheel are consistent, and the vertical center lines are overlapped.
2. A nuclear fuel rod end plug girth welding machine synchro-rotating device as set forth in claim 1, wherein: the matched ejection head device is characterized in that the welding chamber is of a cubic structure with a hollow interior, and one part of the matched ejection head device is inserted into the welding chamber;
the center part of the matched ejector device is an ejector fine adjustment rod;
the fine adjustment nut and the back tightening nut are connected through threads and fixed on the top fine adjustment rod;
the sealing cover is arranged outside the new flange cover to play a sealing role;
the new flange cover is of an internal leak boss structure, one part of the new flange cover is arranged inside the welding chamber, the other part of the new flange cover is arranged outside the welding chamber, the new flange cover is connected with the welding chamber through a screw rod, two bearings are arranged inside the new flange cover, wherein the outer ring of each bearing is tightly attached to the new flange cover, the inner ring of each bearing is tightly attached to the ejector head fine adjustment rod, and the bearings also play a role in transmission support;
the top head is of a cylindrical structure, the left end of the top head is provided with a section of external thread, and the thread is directly connected with a section of internal thread arranged at the rightmost side of the top head fine adjustment rod;
when the tungsten electrode and the welding seam are aligned and adjusted, the tungsten electrode is fixed, and the fine adjustment nut is rotated clockwise to push the new ejector to move longitudinally, so that the longitudinal positions of the welding seam and the tungsten electrode are changed; through manual anticlockwise rotation back of the body tight nut, can die the locking of top fine-tuning pole and back of the body tight nut, guaranteed that the tungsten utmost point centering adjustment after targetting in place, at whole fuel rod spin welding in-process, the relative position of welding seam and tungsten utmost point can not change.
3. A nuclear fuel rod end plug girth welding machine synchro-rotating device as set forth in claim 2, wherein: the whole of the top fine adjustment rod is of a cylindrical structure, the leftmost end of the top fine adjustment rod is provided with an external nut, the middle part of the top fine adjustment rod is provided with a key groove, and the rightmost end of the top fine adjustment rod is provided with an internal thread.
4. A nuclear fuel rod end plug girth welding machine synchro-rotating device as set forth in claim 2, wherein: the fine adjustment nut and the back tightening nut are connected through a key groove in the middle of the ejector fine adjustment rod, and the outer synchronous belt wheel is connected with the ejector fine adjustment rod through a key groove.
5. A nuclear fuel rod end plug girth welding machine synchro-rotating device as set forth in claim 2, wherein: an O-shaped ring and a bearing are embedded in the sealing cover, wherein the outer ring of the O-shaped ring and the bearing is tightly attached to the sealing cover, the inner ring of the O-shaped ring and the bearing is tightly attached to the ejector head fine adjustment rod, the O-shaped ring is used for isolating the air outside the welding chamber and the air inside the welding chamber, and the bearing plays a role in rotation and support.
6. A nuclear fuel rod end plug girth welding machine synchro-rotating device as set forth in claim 2, wherein: the fine adjustment nut and the back nut are both provided with outer knurls and internally provided with a cylindrical structure with an internal thread.
7. A nuclear fuel rod end plug girth welding machine synchro-rotating device as set forth in claim 2, wherein: the sealing cover is of an internal hollow boss structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811548692.8A CN111331228A (en) | 2018-12-18 | 2018-12-18 | Synchronous rotating device of nuclear fuel rod end plug ring welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811548692.8A CN111331228A (en) | 2018-12-18 | 2018-12-18 | Synchronous rotating device of nuclear fuel rod end plug ring welding machine |
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| Publication Number | Publication Date |
|---|---|
| CN111331228A true CN111331228A (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811548692.8A Pending CN111331228A (en) | 2018-12-18 | 2018-12-18 | Synchronous rotating device of nuclear fuel rod end plug ring welding machine |
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| CN (1) | CN111331228A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111724918A (en) * | 2020-06-29 | 2020-09-29 | 西安建筑科技大学 | Weak rigidity cladding pipe area upset power spin friction welding's joint |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5249209A (en) * | 1989-07-07 | 1993-09-28 | Westinghouse Electric Corp. | Control rod canopy seal positioning and welding system |
| JPH06308283A (en) * | 1993-04-23 | 1994-11-04 | Toshiba Corp | Upper end plug welding device for nuclear fuel rod |
| JPH0760489A (en) * | 1993-08-27 | 1995-03-07 | Power Reactor & Nuclear Fuel Dev Corp | Welding equipment |
| JPH0972992A (en) * | 1995-09-04 | 1997-03-18 | Japan Nuclear Fuel Co Ltd<Jnf> | End plug holding device for fuel rod welding |
| JPH09178889A (en) * | 1995-12-28 | 1997-07-11 | Japan Nuclear Fuel Co Ltd<Jnf> | End plug holding device for fuel rod welding |
| CN103182593A (en) * | 2011-12-28 | 2013-07-03 | 中核北方核燃料元件有限公司 | Welding device for lower end plug of guide pipe of pressurized water reactor nuclear power fuel assembly |
| CN209773698U (en) * | 2018-12-18 | 2019-12-13 | 中核建中核燃料元件有限公司 | Synchronous rotating device of nuclear fuel rod end plug ring welding machine |
-
2018
- 2018-12-18 CN CN201811548692.8A patent/CN111331228A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5249209A (en) * | 1989-07-07 | 1993-09-28 | Westinghouse Electric Corp. | Control rod canopy seal positioning and welding system |
| JPH06308283A (en) * | 1993-04-23 | 1994-11-04 | Toshiba Corp | Upper end plug welding device for nuclear fuel rod |
| JPH0760489A (en) * | 1993-08-27 | 1995-03-07 | Power Reactor & Nuclear Fuel Dev Corp | Welding equipment |
| JPH0972992A (en) * | 1995-09-04 | 1997-03-18 | Japan Nuclear Fuel Co Ltd<Jnf> | End plug holding device for fuel rod welding |
| JPH09178889A (en) * | 1995-12-28 | 1997-07-11 | Japan Nuclear Fuel Co Ltd<Jnf> | End plug holding device for fuel rod welding |
| CN103182593A (en) * | 2011-12-28 | 2013-07-03 | 中核北方核燃料元件有限公司 | Welding device for lower end plug of guide pipe of pressurized water reactor nuclear power fuel assembly |
| CN209773698U (en) * | 2018-12-18 | 2019-12-13 | 中核建中核燃料元件有限公司 | Synchronous rotating device of nuclear fuel rod end plug ring welding machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111724918A (en) * | 2020-06-29 | 2020-09-29 | 西安建筑科技大学 | Weak rigidity cladding pipe area upset power spin friction welding's joint |
| CN111724918B (en) * | 2020-06-29 | 2022-08-12 | 西安建筑科技大学 | Weak rigidity cladding pipe area upset power spin friction welded connects |
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